Effect of Fe substitution on the partial oxidation of methane to syngas over La0:7 Sr0:3 Co1􀀀y Fey O3􀀀 perovskites

Abstract

In this research, a series of La0:7 Sr0:3 Co1􀀀y Fey O3􀀀 (y = 0.0–0.4) was successfully synthesized by a solidstatereaction method and syngas production studies were performed using gas chromatography. Thermogravimetricanalysis characterized the concentration of Fe3+ , which gave a low H2 /CO ratio over La0:7 Sr0:3 Co1􀀀y Fey O3􀀀 withoutthe presence of molecular oxygen. All samples possessed a purely rhombohedral structure. The incorporation of moreFe increased the lattice parameter and changed XRD peaks of the La1􀀀x Srx Co0:8 Fe0:2 O3 from sharp and single todouble. Among the catalyst powders tested for syngas production activity, La0:7 Sr0:3 Co0:6 Fe0:4 O3􀀀 (y = 0.4) hadthe low molar ratio of H2 /CO with high content of Fe3+ at 850 °C.